JAVA读取压缩包并上传文件

package com.bsteel.newbase.admin.uploadfile;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.Properties;

import java.util.zip.ZipEntry;

import java.util.zip.ZipInputStream;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.apache.struts.action.Action;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.apache.struts.upload.FormFile;

import com.bsteel.newbase.admin.uploadfile.form.UpLoadFileForm;

import com.bsteel.rscenter.util.Constants;

/**

 *

 * @author yangjuqi 2007-06-01

 *

 */

public class UpLoadFileAction extends Action {

 protected Log log = LogFactory.getLog(getClass());

 private static final String filePath = "/WEB-INF/classes/config/config.properties";

 public ActionForward execute(ActionMapping mapping, ActionForm form,

   HttpServletRequest request, HttpServletResponse response)

   throws Exception {

  UpLoadFileForm uploadfileform = (UpLoadFileForm) form;

  if (StringUtils.defaultString(uploadfileform.getJSP_PATH())

    .equals("upload")) {

   if (uploadfileform.getUpLoadFileName() == null

     || uploadfileform.getTemplate() == null

     || "".equals(uploadfileform.getUpLoadFileName())

     || "".equals(uploadfileform.getTemplate())) {

    request.setAttribute("showok", "0");

    return mapping.findForward("success");

   }

   // 读取文件信息

   System.out.println("uploadfileform.getTheFile()="

     + uploadfileform.getUpLoadFileName());

   FormFile theFile = uploadfileform.getUpLoadFileName();

   // 判断上传文件类型及规定"cbf"

   String fileName = theFile.getFileName();

   int pos = fileName.lastIndexOf(".");

   String postfix = fileName.substring(pos + 1).trim();

   String cbfstr = fileName.substring(0, 3).trim();

   System.out.println("postfix=" + postfix);

   if (!postfix.equalsIgnoreCase(Constants.FILE_ZIP)

     || !cbfstr.equals("cbf")) {

    request.setAttribute("showok", "1");

    return mapping.findForward("success");

   } else {

    // 备份原有文件

    removeFiles(uploadfileform.getTemplate());

    // 上传文件

    try {

     String[] path = loadConfig();

     unzip(theFile, path[0], uploadfileform.getTemplate());

     request.setAttribute("showok", "2");

     log.info("文件上传成功!");

    } catch (Exception e) {

     log.info("上传文件失败:" + e.getMessage());

    }

   }

  }

  return mapping.findForward("success");

 }

 /**

  * 读取资源文件

  *

  * @return

  */

 private String[] loadConfig() {

  Properties config = new Properties();

  String[] properties = new String[2];

  try {

   InputStream is = getClass().getResourceAsStream(filePath);

   if (is == null) {

    return null;

   } else {

    config.load(is);

    properties[0] = config.getProperty("datapath");

    properties[1] = config.getProperty("bakpath");

   }

   return properties;

  } catch (Exception ex) {

   return null;

  }

 }

 /**

  * 备份同类型文件

  */

 private void removeFiles(String str) {

  SimpleDateFormat formatDate = new SimpleDateFormat("yyMMdd");

  String[] path = loadConfig();

  File f = new File(path[0]);

  if (f.exists()) {

   File[] fileList = f.listFiles();

   for (int i = 0; i < fileList.length; i++) {

    String filename = fileList[i].getName(); 

    int beginInt=filename.indexOf("_")+1;

    int endInt=filename.indexOf(".");

    if (filename.substring(beginInt, endInt).equals(str)) {

     fileList[i].renameTo(new File(path[1]

       + fileList[i].getName()

       + formatDate.format(new Date()) + ".bak"));

     log.info("remove file ->" + fileList[i].getName()); 

    }

   }

  }

 }

 /**

  * 上传zip文件

  */

 public void unzip(FormFile thefile, String outputDirectory, String str) {

  try {

   ZipInputStream in = new ZipInputStream(thefile.getInputStream());

   ZipEntry z = in.getNextEntry();

   while (z != null) {

    String zipsName=z.getName();

    //提取压缩包中的xml文件

    int pos = zipsName.lastIndexOf(".");

    String postXml = zipsName.substring(pos + 1).trim();

    if(postXml.equalsIgnoreCase(Constants.FILE_XML)){

     File f = new File(outputDirectory);

     f.mkdir();

     if (z.isDirectory()) {

      f = new File(outputDirectory + "documents_" + str + "."

        + Constants.FILE_XML);

      f.mkdir();

     } else {

      f = new File(outputDirectory + "documents_" + str + "."

        + Constants.FILE_XML);

      f.createNewFile();

      FileOutputStream out = new FileOutputStream(f);

      int b;

      while ((b = in.read()) != -1) {

       out.write(b);

      }

      out.close();

     }

     // 读取下一个ZipEntry

     z = in.getNextEntry();

    }

   }

   in.close();

  } catch (FileNotFoundException e) {

   e.printStackTrace();

  } catch (IOException e) {

   e.printStackTrace();

  }

 }

}